| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2024/2025 | Sestri Levante | Serie C | 34 | 3 | 0 | 8 | 0 | – |
| 2023/2024 | SPAL | Serie C | 32 | 4 | 0 | 3 | 0 | – |
| 2022/2023 | Padova | Serie C | 39 | 1 | 0 | 3 | 0 | – |
| 2021/2022 | Padova | Serie C | 26 | 1 | 0 | 4 | 0 | – |
| 2020/2021 | Vicenza | Serie B | 12 | 2 | 0 | 2 | 0 | 6.6 |
| 2020/2021 | Padova | Serie C | 5 | 0 | 0 | 0 | 0 | – |
| 2019/2020 | Ascoli | Serie B | 13 | 0 | 0 | 4 | 0 | 6.7 |
| 2018/2019 | Ascoli | Serie B | 24 | 1 | 0 | 0 | 0 | – |
| 2017/2018 | Real Oviedo | Segunda División | 7 | 0 | 0 | 1 | 0 | 6.5 |
| 2016/2017 | Spezia | Serie B | 37 | 1 | 0 | 4 | 0 | – |
| 2015/2016 | Spezia | Serie B | 28 | 0 | 0 | 8 | 0 | – |
| 2014/2015 | Spezia | Serie B | 25 | 2 | 0 | 6 | 0 | – |
| 2013/2014 | Livorno | Serie A | 16 | 0 | 0 | 1 | 0 | – |
| 2012/2013 | Rosario Central | Primera Nacional | 28 | 2 | 0 | 7 | 0 | – |
| 2011/2012 | Rosario Central | Primera Nacional | 32 | 0 | 0 | 9 | 0 | – |
| 2010/2011 | Rosario Central | Primera Nacional | 31 | 0 | 0 | 5 | 0 | – |
| 2009/2010 | Rosario Central | Liga Profesional Argentina | 22 | 0 | 0 | 6 | 1 | – |
| 2008/2009 | Rosario Central | Liga Profesional Argentina | 7 | 0 | 0 | 2 | 0 | – |
| Total | 418 | 17 | 0 | 73 | 1 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| - | SPAL | Sestri Levante | Free | |
| - | Calcio Padova | SPAL | Free | |
| 07 Jan 2021 | Vicenza | Calcio Padova | N/A | |
| - | Calcio Padova | Vicenza | Loan | |
| 09 Sept 2020 | Ascoli | Calcio Padova | Free | |
| - | Oviedo | Ascoli | Free | |
| - | Spezia | Oviedo | Free | |
| 08 Dec 2014 | Livorno | Spezia | Free | |
| - | Rosario | Livorno | Free |
N. Valentini career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.